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.TH INTTYPES.H 3HEAD "Sep 10, 2004"
.SH NAME
inttypes.h, inttypes \- fixed size integer types
.SH SYNOPSIS
.LP
.nf
#include <\fBinttypes.h\fR>
.fi

.SH DESCRIPTION
.sp
.LP
The <\fBinttypes.h\fR> header includes the <\fBstdint.h\fR> header.
.sp
.LP
The <\fBinttypes.h\fR> header includes a definition of the following type:
.sp
.ne 2
.na
\fB\fBimaxdiv_t\fR\fR
.ad
.RS 13n
structure type that is the type of the value returned by the \fBimaxdiv()\fR
function.
.RE

.sp
.LP
The following macros are defined. Each expands to a character string literal
containing a conversion specifier, possibly modified by a length modifier,
suitable for use within the format argument of a formatted input/output
function when converting the corresponding integer type. These macros have the
general form of \fBPRI\fR (character string literals for the \fBfprintf()\fR
and \fBfwprintf()\fR family of functions) or \fBSCN\fR (character string
literals for the \fBfscanf()\fR and \fBfwscanf()\fR family of functions),
followed by the conversion specifier, followed by a name corresponding to a
similar type name in <\fBstdint.h\fR>. In these names, \fIN\fR represents the
width of the type as described in <\fBstdint.h\fR>. For example,
\fBPRIdFAST32\fR can be used in a format string to print the value of an
integer of type \fBint_fast32_t\fR.
.sp
.LP
The \fBfprintf()\fR macros for signed integers are:
.sp
.in +2
.nf
PRId\fIN\fR  PRIdLEAST\fIN\fR  PRIdFAST\fIN\fR  PRIdMAX  PRIdPTR
PRIi\fIN\fR  PRIiLEAST\fIN\fR  PRIiFAST\fIN\fR  PRIiMAX  PRIiPTR
.fi
.in -2

.sp
.LP
The \fBfprintf()\fR macros for unsigned integers are:
.sp
.in +2
.nf
PRIo\fIN\fR   PRIoLEAST\fIN\fR  PRIoFAST\fIN\fR  PRIoMAX  PRIoPTR
PRIu\fIN\fR   PRIuLEAST\fIN\fR  PRIuFAST\fIN\fR  PRIuMAX  PRIuPTR
PRIx\fIN\fR   PRIxLEAST\fIN\fR  PRIxFAST\fIN\fR  PRIxMAX  PRIxPTR
PRIX\fIN\fR   PRIXLEAST\fIN\fR  PRIXFAST\fIN\fR  PRIXMAX  PRIXPTR
.fi
.in -2

.sp
.LP
The \fBfscanf()\fR macros for signed integers are:
.sp
.in +2
.nf
SCNd\fIN\fR  SCNdLEAST\fIN\fR  SCNdFAST\fIN\fR  SCNdMAX  SCNdPTR
SCNi\fIN\fR  SCNiLEAST\fIN\fR  SCNiFAST\fIN\fR  SCNiMAX  SCNiPTR
.fi
.in -2

.sp
.LP
The \fBfscanf()\fR macros for unsigned integers are:
.sp
.in +2
.nf
SCNo\fIN\fR  SCNoLEAST\fIN\fR  SCNoFAST\fIN\fR  SCNoMAX  SCNoPTR
SCNu\fIN\fR  SCNuLEAST\fIN\fR  SCNuFAST\fIN\fR  SCNuMAX  SCNuPTR
SCNx\fIN\fR  SCNxLEAST\fIN\fR  SCNxFAST\fIN\fR  SCNxMAX  SCNxPTR
.fi
.in -2

.sp
.LP
For each type that the implementation provides in <\fBstdint.h\fR>, the
corresponding \fBfprintf()\fR and  \fBfwprintf()\fR macros must be defined. The
corresponding \fBfscanf()\fR and \fBfwscanf()\fR macros must be defined as
well, unless the implementation does not have a suitable modifier for the type.
.SH USAGE
.sp
.LP
The purpose of <\fBinttypes.h\fR> is to provide a set of integer types whose
definitions are consistent across machines and independent of operating systems
and other implementation idiosyncrasies. It defines, with a \fBtypedef\fR,
integer types of various sizes. Implementations are free to \fBtypedef\fR them
as ISO C standard integer types or extensions that they support. Consistent use
of this header greatly increases the portability of applications across
platforms.
.SH EXAMPLES
.LP
\fBExample 1 \fRUse of Macro
.sp
.LP
The following code uses one of the macros available through <\fBinttypes.h\fR>.

.sp
.in +2
.nf
#include <inttypes.h>
#include <wchar.h>
int main(void)
{
     uintmax_t i = UINTMAX_MAX; // This type always exists.
     wprintf("The largest integer value is %020"
          PRIxMAX, "\en", i);
     return 0;
}
.fi
.in -2

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
.TE

.SH SEE ALSO
.sp
.LP
.BR imaxdiv (3C),
.BR attributes (7),
.BR standards (7)
